Implemented websockets in foodpal ctrl.

client/src/main/java/client/scenes/FoodpalApplicationCtrl.java

@@ -13,10 +13,14 @@ import client.utils.DefaultRecipeFactory;
 import client.utils.LocaleAware;
 import client.utils.LocaleManager;
 import client.utils.ServerUtils;
+import client.utils.WebSocketUtils;
 
 import commons.Recipe;
 
+import commons.ws.Topics;
+import commons.ws.messages.Message;
 import jakarta.inject.Inject;
+import javafx.application.Platform;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.scene.control.Alert;
@@ -32,6 +36,7 @@ import javafx.scene.text.Font;
 
 public class FoodpalApplicationCtrl implements LocaleAware {
     private final ServerUtils server;
+    private final WebSocketUtils webSocketUtils;
     private final LocaleManager localeManager;
     private final IngredientListCtrl ingredientListCtrl;
     private final RecipeStepListCtrl stepListCtrl;
@@ -81,15 +86,42 @@ public class FoodpalApplicationCtrl implements LocaleAware {
     @Inject
     public FoodpalApplicationCtrl(
             ServerUtils server,
+            WebSocketUtils webSocketUtils,
             LocaleManager localeManager,
             IngredientListCtrl ingredientListCtrl,
             RecipeStepListCtrl stepListCtrl
     ) {
         this.server = server;
+        this.webSocketUtils = webSocketUtils;
         this.localeManager = localeManager;
         this.ingredientListCtrl = ingredientListCtrl;
         this.stepListCtrl = stepListCtrl;
+
+        initializeWebSocket();
     }
+
+    private void initializeWebSocket() {
+        webSocketUtils.connect(() -> {
+            webSocketUtils.subscribe(Topics.RECIPES, (Message _) -> {
+                Platform.runLater(() -> {
+                    Recipe selectedRecipe = recipeList.getSelectionModel().getSelectedItem();
+                    refresh(); // refresh the left list
+                    if (selectedRecipe == null) {
+                        return;
+                    }
+
+                    // select last selected recipe if it still exists, first otherwise (done by refresh())
+                    Recipe recipeInList = recipeList.getItems().stream()
+                            .filter(r -> r.getId().equals(selectedRecipe.getId()))
+                            .findFirst()
+                            .orElse(null);
+
+                    showRecipeDetails(recipeInList);
+                }); // runLater as it's on another non-FX thread.
+            });
+        });
+    }
+
     @Override
     public void initializeComponents() {
         // TODO Reduce code duplication??
@@ -146,6 +178,7 @@ public class FoodpalApplicationCtrl implements LocaleAware {
 
         refresh();
     }
+
     private void showName(String name) {
         final int NAME_FONT_SIZE = 20;
         editableTitleArea.getChildren().clear();
@@ -153,6 +186,7 @@ public class FoodpalApplicationCtrl implements LocaleAware {
         nameLabel.setFont(new Font("System Bold", NAME_FONT_SIZE));
         editableTitleArea.getChildren().add(nameLabel);
     }
+
     @Override
     public void updateText() {
         addRecipeButton.setText(getLocaleString("menu.button.add.recipe"));
@@ -206,11 +240,13 @@ public class FoodpalApplicationCtrl implements LocaleAware {
         }
         detailsScreen.visibleProperty().set(!recipes.isEmpty());
     }
+
     private void printError(String msg) {
         Alert alert = new Alert(Alert.AlertType.ERROR);
         alert.setContentText(msg);
         alert.showAndWait();
     }
+
     /**
      * Adds a recipe, by providing a default name "Untitled recipe (n)"
      * The UX flow is now:
@@ -283,7 +319,7 @@ public class FoodpalApplicationCtrl implements LocaleAware {
             try {
                 server.updateRecipe(selected);
                 refresh();
-                recipeList.getSelectionModel().select(selected);
+                //recipeList.getSelectionModel().select(selected);
             } catch (IOException | InterruptedException e) {
                 // throw a nice blanket UpdateException
                 throw new UpdateException("Error occurred when updating recipe name!");
@@ -294,7 +330,6 @@ public class FoodpalApplicationCtrl implements LocaleAware {
         edit.requestFocus();
     }
 
-
     // Language buttons
     @FXML
     private void switchLocale(ActionEvent event) {